limit max module size and improve some help messages

.pylintrc

@@ -149,7 +149,7 @@ indent-string='    '
 max-line-length=100
 
 # Maximum number of lines in a module.
-max-module-lines=1000
+max-module-lines=400
 
 # Allow the body of a class to be on the same line as the declaration if body
 # contains single statement.